Bilgic Istoc, Sami ; Winner, H. (2018)
Heat Cracks in Brake Discs for Heavy Vehicles.
In: Automotive and Engine Technology
doi: 10.1007/s41104-018-0027-y
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Existing models describing the formation of heat cracks in heavy-duty vehicles are not detailed enough to predict the sensitivity of brake discs for heat cracks. In this paper, results from a dynamometer experiment are discussed. They allow a deeper understanding of the processes that result in the failure of brake discs. The experiment described is a standardized heat crack test, which was performed over 300 cycles and ended with a through-thickness crack. During the test, the brake disc was monitored via a thermographic camera, a pyrometer, two sliding thermocouples, a set of capacitive displacement sensors, and an eddy current crack detector. The results show that the current explanation model might not consider several factors that contribute to the crack propagation. Cyclic shear movements at the disc surface are observed, which are likely caused by the cooling channel pins. The variation of the coning of the disc correlates with the maximum disc surface temperature and the crack growth rate. The consequences of the observations are discussed to develop a more detailed model to explain the formation of heat cracks.
| Typ des Eintrags: | Artikel | ||||
|---|---|---|---|---|---|
| Erschienen: | 2018 | ||||
| Autor(en): | Bilgic Istoc, Sami ; Winner, H. | ||||
| Art des Eintrags: | Bibliographie | ||||
| Titel: | Heat Cracks in Brake Discs for Heavy Vehicles | ||||
| Sprache: | Englisch | ||||
| Publikationsjahr: | 19 April 2018 | ||||
| Verlag: | Springer International Publishing | ||||
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Automotive and Engine Technology | ||||
| DOI: | 10.1007/s41104-018-0027-y | ||||
| URL / URN: | https://doi.org/10.1007/s41104-018-0027-y | ||||
| Kurzbeschreibung (Abstract): | Existing models describing the formation of heat cracks in heavy-duty vehicles are not detailed enough to predict the sensitivity of brake discs for heat cracks. In this paper, results from a dynamometer experiment are discussed. They allow a deeper understanding of the processes that result in the failure of brake discs. The experiment described is a standardized heat crack test, which was performed over 300 cycles and ended with a through-thickness crack. During the test, the brake disc was monitored via a thermographic camera, a pyrometer, two sliding thermocouples, a set of capacitive displacement sensors, and an eddy current crack detector. The results show that the current explanation model might not consider several factors that contribute to the crack propagation. Cyclic shear movements at the disc surface are observed, which are likely caused by the cooling channel pins. The variation of the coning of the disc correlates with the maximum disc surface temperature and the crack growth rate. The consequences of the observations are discussed to develop a more detailed model to explain the formation of heat cracks. |
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| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Fahrzeugtechnik (FZD) 16 Fachbereich Maschinenbau > Fachgebiet Fahrzeugtechnik (FZD) > Bremse |
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| Hinterlegungsdatum: | 03 Jul 2018 13:51 | ||||
| Letzte Änderung: | 11 Dez 2019 07:33 | ||||
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